Which statement illustrates Newton's first law?
a. a stone will not move unless something pushes or pulls it
b. a ball rolling across the floor eventually slows down
c. as a car comes to a stop, the passengers continue to move forward
d. all of the above

Increasing which of these conditions results in more gravitational force between two objects?
a. distance
b. acceleration
c. mass
d. surface area

Free-fall acceleration near Earth's surface

Orbital motion is a combination of

Which statement about weight is INCORRECT?
a. an object weighs more on the moon than it weighs more on the moon than it weighs on Earth
b. a change in an object's location can change the object's weight